Hello,
The issue of the Tabs layout is caused by the Single product Layout that you have set. Please try removing the Single product layout from Dashboard >> Layouts. Then check back.
Sorry but the layout of tabs while using layout builder cannot be controlled by Theme Settings. If you want to use Single product layout then you can either have tabs or accordion layout for the single product tabs.
But Alternately, You can add 2 product tabs elements in the Single product layout and make one to tabs and other to accordion. And hidden the accordion tabs on Desktop and the Simple tabs on Mobile.
Best Regards.